已知单位向量
的夹角为
,向量
,
,则向量
,
夹角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e156c75cf0bbc71732226e89931bb061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ee6d70adacca076f64fd1948cc041b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
2023·全国·模拟预测 查看更多[3]
更新时间:2023-11-22 17:56:59
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